The main objectives of this work are to describe the heat island phenomenon in the urban area of Caxias Maranhão, measure the temperature in the morning and afternoon, compare the temperatures in the center of Caxias with outlying neighborhoods and present solutions for mitigating it. We believe that this study is necessary, since the consequences of the occupation and development process in Caxias Maranhão, its poor urban planning, large-scale production of waste (solid, liquid and gaseous) have been causing thermal imbalance, hindering evaporation, reducing the dispersion power of atmospheric pollutants, generated mainly in the city center, which has raised its temperature.